package com.atguigu.gmall.realtime.dim.function;

import com.alibaba.fastjson.JSONObject;
import com.atguigu.gmall.realtime.common.bean.TableProcessDim;
import com.atguigu.gmall.realtime.common.util.JdbcUtil;
import org.apache.flink.api.common.state.BroadcastState;
import org.apache.flink.api.common.state.MapStateDescriptor;
import org.apache.flink.api.common.state.ReadOnlyBroadcastState;
import org.apache.flink.api.java.tuple.Tuple2;
import org.apache.flink.configuration.Configuration;
import org.apache.flink.streaming.api.functions.co.BroadcastProcessFunction;
import org.apache.flink.util.Collector;

import java.sql.Connection;
import java.util.*;

/**
 * @author Felix
 * @date 2024/6/19
 * 对关联后的数据进行处理函数类
 */
public class TableProcessFunction extends BroadcastProcessFunction<JSONObject, TableProcessDim, Tuple2<JSONObject, TableProcessDim>> {
    private Map<String,TableProcessDim> configMap = new HashMap<>();
    private MapStateDescriptor<String, TableProcessDim> mapStateDescriptor;

    public TableProcessFunction(MapStateDescriptor<String, TableProcessDim> mapStateDescriptor) {
        this.mapStateDescriptor = mapStateDescriptor;
    }

    //将配置表中的配置信息预加载到程序中
    @Override
    public void open(Configuration parameters) throws Exception {
        Connection mysqlConnection = JdbcUtil.getMysqlConnection();
        String sql = "select * from gmall1226_config.table_process_dim";
        List<TableProcessDim> tableProcessDimList = JdbcUtil.queryList(mysqlConnection, TableProcessDim.class, sql, true);
        for (TableProcessDim tableProcessDim : tableProcessDimList) {
            configMap.put(tableProcessDim.getSourceTable(),tableProcessDim);
        }
        JdbcUtil.closeConnection(mysqlConnection);
    }

    //处理主流数据    根据表名到广播状态中获取对应的配置信息，如果能够获取到，说明处理的是维度数据，传递到下游
    @Override
    public void processElement(JSONObject jsonObj, BroadcastProcessFunction<JSONObject, TableProcessDim, Tuple2<JSONObject, TableProcessDim>>.ReadOnlyContext ctx, Collector<Tuple2<JSONObject, TableProcessDim>> out) throws Exception {
        //获取操作的业务数据库表的表名
        String table = jsonObj.getString("table");
        //获取广播状态
        ReadOnlyBroadcastState<String, TableProcessDim> broadcastState = ctx.getBroadcastState(mapStateDescriptor);
        //根据表名到广播状态中获取对应的配置信息
        TableProcessDim tableProcessDim = null;

        if((tableProcessDim = broadcastState.get(table)) != null
                || (tableProcessDim = configMap.get(table)) != null){
            //如果从广播状态中获取到了对应的配置，说明是维度数据，向下游传递
            JSONObject dataJsonObj = jsonObj.getJSONObject("data");
            //在向下游传递数据前，过滤掉data中不需要传递的属性
            String sinkColumns = tableProcessDim.getSinkColumns();
            deleteNotNeedColumns(dataJsonObj,sinkColumns);
            //在向下游传递数据前，补充业务数据库维度表的操作类型
            String type = jsonObj.getString("type");
            dataJsonObj.put("type",type);

            out.collect(Tuple2.of(dataJsonObj,tableProcessDim));
        }
    }

    //处理广播流数据
    @Override
    public void processBroadcastElement(TableProcessDim tableProcessDim, BroadcastProcessFunction<JSONObject, TableProcessDim, Tuple2<JSONObject, TableProcessDim>>.Context ctx, Collector<Tuple2<JSONObject, TableProcessDim>> out) throws Exception {
        //获取对配置表进行的操作的类型
        String op = tableProcessDim.getOp();
        //获取广播状态
        BroadcastState<String, TableProcessDim> broadcastState = ctx.getBroadcastState(mapStateDescriptor);
        //获取业务数据库维度表的表名
        String key = tableProcessDim.getSourceTable();
        if("d".equals(op)){
            //从配置表中删除了一条配置信息   从广播状态中将对应的配置删除掉
            broadcastState.remove(key);
            configMap.remove(key);
        }else{
            //对配置表进行了读取、添加或者更新操作   将最新的配置信息放到广播状态中
            broadcastState.put(key,tableProcessDim);
            configMap.put(key,tableProcessDim);
        }
    }

    //过滤掉data中不需要传递的属性
    //dataJsonObj : {"tm_name":"Redmi","create_time":"2021-12-14 00:00:00","logo_url":"abc","id":1}
    //sinkColumns : id,tm_name
    private static void deleteNotNeedColumns(JSONObject dataJsonObj, String sinkColumns) {
        String[] columnArr = sinkColumns.split(",");
        List<String> columnList = Arrays.asList(columnArr);

        Set<Map.Entry<String, Object>> entrySet = dataJsonObj.entrySet();
        entrySet.removeIf(entry-> !columnList.contains(entry.getKey()));

    }
}
